Home / 431,396.10-647,037.45-131,906.70

Finding the Fourth Proportional to 431,396.10, 647,037.45 and 131,906.70

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Solution

The fourth proportional to 431,396.10, 647,037.45 and 131,906.70 is: 197,842.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,396.10 : 647,037.45 = 131,906.70 : x
  2. Step 2: Convert to fraction form
    431,396.10/647,037.45 = 131,906.70/x
  3. Step 3: Cross multiply
    431,396.10x = 647,037.45 × 131,906.70
  4. Step 4: Simplify right side
    431,396.10x = 85,348,574,805.92
  5. Step 5: Solve for x
    x = 85,348,574,805.92/431,396.10
  6. Step 6: Final answer
    x = 197,842.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.